A sharp sculpture made of thousands of pieces of jagged glass.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The hallucinogenic center of the ancient world.

A spectacular cave and a beguiling lake.

On the outskirts of the small village, an abandoned grassy field glitters thanks to the white stones of an ancient structure.

This apartment is a true time capsule of local life in Bulgaria during the Soviet regime.

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

Crossing a suspension bridge above a forest is the only way to reach this 12th-century monastery.

One of the largest mines in Bulgaria is now home to a vast museum more than 100 feet underground.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

Not far from a popular beach, an unfinished, abandoned mansion for Bulgaria's last communist dictator.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

Eastern Bloc nostalgia, anybody?

This once-grandiose behemoth of a monument from the socialist era now sits quiet and closed up.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

A collection of art from Bulgaria's time as a communist state.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.